City report · United States
Thornton
Measured across a 2 km radius around Thornton, CO, USA (12.57 km²)
- Tree cover
- 19.5%
- Air quality
- 52Moderate
- Trees in this area
- 61.1K
- More trees needed
- 32.9K
- Area analysed
- 12.53 km²land, in a 12.57 km² circle
- Satellite image
- Sep 9, 2026
Thornton's tree count comes to 61,077 trees across 12.53 km² of land — 10 points below the 30% tree-cover level considered healthy for this area, meaning roughly 32,888 more trees would close the gap. Air quality currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tree cover detail
Below target
19.5% tree cover against a 30% healthy-neighbourhood target, across 12.53 km² of land.
Trees in this area
61,077
Target trees
93,965
More trees needed
32,888
CO₂ if planted / yr
723.5 t
Air quality detail
AQI 52Moderate
Observed Sep 21, 21:00 local time via Open-Meteo / CAMS. Values in µg/m³.
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
12.1
PM10
12.5
NO₂
36.8
O₃
50.0
SO₂
0.9
CO
151.0
Frequently asked
Questions about Thornton
What is the tree count in Thornton?
Thornton has an estimated 61,077 trees across the 12.53 km² of land measured — 19.5% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Thornton need?
Thornton needs roughly 32,888 more trees to close a 10-point shortfall against its 30% tree-cover target — about 723.5 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Thornton right now?
The latest reading for Thornton shows an AQI of 52 (Moderate), observed Sep 21, 21:00 local time via Open-Meteo / CAMS. Unusually sensitive people should consider limiting long outdoor exertion.
How is Thornton's tree cover and air quality measured?
Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Thornton; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS and may differ from street-level monitors.
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